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Proceedings Paper

Near-field intensity distribution from a bow-tie aperture VCSEL with its polarization state improved
Author(s): Hongfeng Gai; Jia Wang; Qian Tian; Wei Xia; Xiangang Xu
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Paper Abstract

A micro-aperture vertical-cavity surface-emitting laser (VCSEL) is a kind of active nanophotonics devices. It can confine the optical near-field to a nanometric light spot of high intensity. The confinement effect is usually implemented by a round aperture. A bow-tie aperture can do it better if the incident light polarizes along the line between its ridges. However, a conventional VCSEL does not have a definite polarization state, so a bow-tie aperture VCSEL is very difficult to be implemented. In order to solver this problem, a rectangular aperture array is employed to improve the polarization state. Two bow-tie aperture VCSELs with and without their polarization state improved are fabricated. Their near-field intensity distribution is measured and compared. The measurement results demonstrate that the near-field intensity is enhanced dramatically when the polarization state is improved. So the confinement and enhancement effect of a bow-tie aperture can be obtained on the basis of a micro-aperture VCSEL.

Paper Details

Date Published: 15 January 2008
PDF: 5 pages
Proc. SPIE 6831, Nanophotonics, Nanostructure, and Nanometrology II, 683106 (15 January 2008); doi: 10.1117/12.784937
Show Author Affiliations
Hongfeng Gai, Tsinghua Univ. (China)
Jia Wang, Tsinghua Univ. (China)
Qian Tian, Tsinghua Univ. (China)
Wei Xia, Shandong Univ. (China)
Xiangang Xu, Shandong Univ. (China)


Published in SPIE Proceedings Vol. 6831:
Nanophotonics, Nanostructure, and Nanometrology II
Xing Zhu; Stephen Y. Chou; Yasuhiko Arakawa, Editor(s)

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